diff --git a/lib/harmony/harmonydb/sql/20230712.sql b/lib/harmony/harmonydb/sql/20230712.sql
index 37024b471..168289f09 100644
--- a/lib/harmony/harmonydb/sql/20230712.sql
+++ b/lib/harmony/harmonydb/sql/20230712.sql
@@ -13,7 +13,11 @@ create table sector_location
         primary key (miner_id, sector_num, sector_filetype, storage_id)
 );
 
+alter table lotus.sector_location
+    alter column read_refs set not null;
 
+alter table lotus.sector_location
+    alter column read_refs set default 0;
 
 create table storage_path
 (